I didn't say that Tesla should do this, much less be forced to do it. If they did open up their charger network, they would have to make a profit from it some

I didn't say that Tesla should do this, much less be forced to do it. If they did open up their charger network, they would have to make a profit from it some how. For example, Tesla could set a higher price for charging cars made by other manufacturers, and the limits on how long they could charge for would act as another reminder to car owners of the benefits of a Tesla. I think your logic of exclusivity works both ways, and suggests that other charging networks should forbid Teslas from charging on them, unless Tesla paid them a huge annual service charge. To some extent, a rising tide lifts all boats, so encouraging more people to buy electric cars provides more charging points for Tesla owners even if the company stop building superchargers.